Microstructure and Temperature Stability of Ca Substituted Forsterite Ceramics
In this paper, the dependance of microstructures on temperature stability of the (Mg1-xCax)2SiO4 (0≤x≤0.5) ceramics prepared by the conventional solid-state route were investigated. The XRD and SEM testing results showed the (Mg1-xCax)2SiO4 ceramics were mainly composed of both forsterite (Mg2SiO4) phase and Monticouite (MgCaSiO4) phase. Significantly, with increasing x, the ceramic temperature coefficients of resonant frequency (τf) were strongly correlated to the ceramic crystalline phase compositions and could be adjusted to near zero value through changing the contents of both phases. And its dielectric constants (er) were kept in the range of 6.8 to 8.7, and the quality factors (Q×f value) in the range of 18, 080 GHz to 55, 840 GHz at 15GHz.
Huixuan Zhang, Ye Han, Fuxiao Chen and Jiuba Wen
K. X. Song et al., "Microstructure and Temperature Stability of Ca Substituted Forsterite Ceramics", Applied Mechanics and Materials, Vols. 117-119, pp. 606-609, 2012